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Standard XII

Chemistry

Concentration Terms - An Introduction (w/w etc)

NaCl, NaBr,...

Question

$N a C l$ , $N a B r$ , $N a I$ mixture on adding $c o n c . H_{2} S O_{4}$ gives gases, respectively :

H C l

B r_{2}

I_{2}

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H C l

H B r

H I

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C l_{2}

B r_{2}

I_{2}

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None of these

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Solution

The correct option is A $H C l$ , $B r_{2}$ , $I_{2}$
Option (B) is correct.
$N a C l$ , $N a B r$ , $N a I$ mixture on adding $c o n c . H_{2} S O_{4}$ gives $H C l$ , $B r_{2}$ , $I_{2}$ gases, respectively.
$H B r$ and $H I$ are strong reducing agents and are oxidized by $H_{2} S O_{4}$ to $B r_{2}$ and $I_{2}$ , respectively.
$N a C l + c o n c . H_{2} S O_{4} ⟶ N a_{2} S O_{4} + H C l$
$N a B r + c o n c . H_{2} S O_{4} ⟶ N a_{2} S O_{4} + B r_{2} + H_{2} O + S O_{2}$
$N a I + c o n c . H_{2} S O_{4} ⟶ N a_{2} S O_{4} + I_{2} + H_{2} O + H_{2} S$

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Similar questions

The correct order of the oxidizing power of Cl₂, Br₂, I₂ and O₂ is:

Q. Consider the following orders –
(1)

F_{2} > C l_{2} > B r_{2} > I_{2} :

boiling point
(2)

F_{2} > C l_{2} > B r_{2} > I_{2} :

oxidizing nature
(3)

F_{2} > C l_{2} > B r_{2} > I_{2} :

EN
(4)

F_{2} > C l_{2} > B r_{2} > I_{2} :

BDE
(5)

F_{2} > C l_{2} > B r_{2} > I_{2} :

EA
(6)

F_{2} > C l_{2} > B r_{2} > I_{2} :

Reactivity
(7)

H O C l > H C l O_{2} > H C l O_{3} > H C l O_{4} :

Acidic nature
(8)

H O C l > H C l O_{2} > H C l O_{3} > H C l O_{4} :

Oxidizing nature
Then calculate

(x^{2} + y^{2})

when

x

is correct order and

y

is incorrect order.

Arrange the following in the order of property indicated for each set:

$F_{2}, C l_{2}, B r_{2}, I_{2}$ - increasing bond dissociation enthalpy.

HF,HCl, HBr, HI- Increasing acid strength.

$N H_{3}, P H_{3}, A s H_{3}, S b H_{3}, B i H_{3}$ - increasing base strength.

Q. Arrange the following in order of property indicated for each set:
a.

F_{2}, C l_{2}, B r_{2}, I_{2}

- increasing bond dissociation enthalpy.
b.

H F, H C l, H B r, H I

- increasing acid strength.
c.

N H_{3}, P H_{3}, A s H_{3}, S b H_{3}, B i H_{3}

- increasing base strength.

Q. Assertion :In organic layer test ,

C l_{2}

water is added to the sodium extract which oxidizes

B r^{θ}

and

I^{θ}

ions to

B r_{2}

and

I_{2}

respectively. Reason: Reduction potential of

C l_{2}

is greater than that of

B r_{2}

and

I_{2}

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NaCl, NaBr, NaI mixture on adding conc.H2SO4 gives gases, respectively :

$N a C l$ , $N a B r$ , $N a I$ mixture on adding $c o n c . H_{2} S O_{4}$ gives gases, respectively :